Trả lời :
\(\frac{1998\times1996+1997\times11+1985}{1997\times1996-1995\times1996}\)
\(=\frac{1998\times1996+\left(1996+1\right)\times11+1985}{1996\times\left(1997-1995\right)}\)
\(=\frac{1998\times1996+1996\times11+11+1985}{1996\times2}\)
\(=\frac{1998\times1996+1996\times11+1996}{1996\times2}\)
\(=\frac{1996\times\left(1998+11+1\right)}{1996\times2}\)
\(=\frac{2010}{2}\)
\(=1005\)
998*1996+1997*11+1985/1997*1996-1995*1996
Tính nhanh biểu thức sau:
A= 1998*1996+1997*11+1985/1997*1996-1995*1996
1998×1996+1997×11+1985
1997×1996-1995×1996=?
Tính nhanh :
1998 . 1996 + 1997 . 11 + 1985
----------------------------------------------
1997 .1996 - 1995 . 1996
1998 x 1996 + 1997 x 11 + 1985 : 1997 x 1996 - 1995 x 1996
1998nhan 1996 + 1997 nhan 11 + 1985 / 1997 nhan 1996 - 1995 nhan 1996
Tính biểu thức sau một cách hợp lí nhất:
a,1998 x 1996 + 1997 x 11 + 1985/1997 x 1996 - 1995 x 19961
b,A=1/2+1/4+1/8+......+1/512+1/1024
1998*996+1997*11+1985/1997*1996-1995*1996
1998 x 1996 + 1997 x 11 + 1985/1997 x 1996 - 1995 x1996
